Fluctuation theorem for a double quantum dot coupled to a point-contact electrometer

Details Fluctuation theorem for a double quantum dot coupled to a point-contact electrometer Fluctuation theorem for a double quantum dot coupled to a point-contact electrometer

2011-05-16

arxiv.org/abs/1105.3134v2

Physical Review B 84, 075323 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

12 pages, 3 figures. Published version

Scientific paper

10.1103/PhysRevB.84.075323

We study single-electron transport through a double quantum dot (DQD) monitored by a capacitively coupled quantum point-contact (QPC) electrometer. We derive the full counting statistics for the coupled DQD - QPC system and obtain the joint probability distribution of the charges transferred through the DQD and the QPC consistent with the fluctuation theorem (FT). The system can be described by a master equation with tunneling rates depending of the counting fields and satisfying a generalized local detailed-balance relation. Furthermore, we derive universal relations between the non-linear corrections to the current and noise, which can be verified in experiment.

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